TAUNTON — The number of heroin overdoses reported by police this year has reached 140.

Police said both of the most recently reported overdoses were called in on Sunday.

The first was at 1:40 p.m. for a person who had overdosed at an apartment house at 5 Granite St.

The second, at 9:40 p.m., was a 911 call for a woman who was unconscious in the parking lot of B&E Variety at 185 Weir St.

Police said the 33-year-old Mansfield woman was revived after an EMT administered the opioid blocker Narcan.

The woman’s sister told police she had picked her up 20 minutes earlier and had been driving around looking for the sister’s boyfriend when she suddenly became unresponsive.

She told police she then pulled into the convenience store parking lot to call 911 and wait for first responders.

After being revived, the woman was transported to Morton Hospital for further evaluation.

Ten people have died in Taunton from heroin overdoses in 2014, according to police.

The most recent death was less than a week ago when police said 23-year-old Nicholas Rec overdosed in an East Britannia Street apartment where he was spending the night with a 23-year-old woman. Police say the woman admitted she and Rec injected heroin together earlier in the night.

The recent surge of overdoses follows a 10-day lull in early April when no heroin-related overdoses were reported.

On Monday, police Chief Edward Walsh attributed the ebb-and-flow pattern of reported heroin overdoses to a “fluctuation of different supply chains in the city.”

The bulk of the heroin causing the overdoses, he said, continues to be laced either with the powerful painkiller Fentanyl or a similar prescription drug.

Walsh said most, but not all, of the heroin coming into Taunton is funneling in from Providence. He said he’s kept in touch with Providence law enforcement about the problem.